advent_of_code_2023/Day07/python/solution2.py

90 lines
2.4 KiB
Python

from collections import Counter
def read_hands(file_path):
try:
with open(file_path, "r") as file:
print("Reading hands...")
return [line.strip().split() for line in file]
except Exception as e:
print(f"Error reading file {file_path}: {e}")
raise
def replace_face_cards(hand):
replacements = {"T": "a", "J": "1", "Q": "c", "K": "d", "A": "e"}
return "".join(replacements.get(card, card) for card in hand)
def strength(hand):
hand = replace_face_cards(hand)
C = Counter(hand)
target = max(
C, key=lambda k: (C[k], k != "1")
) # Find the target card, excluding joker
if "1" in C and target != "1":
C[target] += C["1"]
del C["1"]
if sorted(C.values()) == [5]:
category = 10
elif sorted(C.values()) == [1, 4]:
category = 9
elif sorted(C.values()) == [2, 3]:
category = 8
elif sorted(C.values()) == [1, 1, 3]:
category = 7
elif sorted(C.values()) == [1, 2, 2]:
category = 6
elif sorted(C.values()) == [1, 1, 1, 2]:
category = 5
elif sorted(C.values()) == [1, 1, 1, 1, 1]:
category = 4
else:
raise ValueError(f"Invalid hand: {C} {hand}")
print(f"Hand: {hand}, Category: {category}")
return (category, hand)
def hand_key(hand):
return strength(hand[0])
def calculate_total_winnings(file_path):
hands = read_hands(file_path)
print("Sorting hands based on strength...")
sorted_hands = sorted(hands, key=hand_key, reverse=True)
total_winnings = sum(
int(bid) * (len(hands) - index) for index, (_, bid) in enumerate(sorted_hands)
)
print("Calculating total winnings...")
return total_winnings
def test(file_path):
print(f"Running test with {file_path}...")
try:
expected_result = 5905
total_winnings = calculate_total_winnings(file_path)
assert (
total_winnings == expected_result
), f"Test failed, expected {expected_result} but got {total_winnings}"
print(f"Test passed: {total_winnings}")
except Exception as e:
print(f"Test failed: {e}")
def main():
try:
test("../test.txt")
result = calculate_total_winnings("../input.txt")
print(f"Total result from input.txt: {result}")
except Exception as e:
print(f"An error occurred: {e}")
if __name__ == "__main__":
main()